Product Diagnosis on Fernando Ruizhttps://www.fernandoux.com/tags/product-diagnosis/Recent content in Product Diagnosis on Fernando RuizHugoen-usMon, 01 Jun 2026 15:01:17 -0500WTFast Activation Redesignhttps://www.fernandoux.com/work/wtfast/Wed, 15 Nov 2023 00:00:00 +0000https://www.fernandoux.com/work/wtfast/The product was quietly lying to its users. Design didn’t fix that. Finding the bug did. Then design made it feel inevitable.